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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 15 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.True or false: a potentiometer is a resistance knob. (a) True (b) False
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  4. 4.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) resistor (d) LDR
  5. 5.True or false: a motor makes things spin. (a) True (b) False
  6. 6.🧩 Which component stores a little charge? (a) LDR (b) motor (c) LED (d) capacitor
  7. 7.🧩 Which component limits the current? (a) capacitor (b) buzzer (c) resistor (d) LED
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  9. 9.🧩 Which component has coloured bands? (a) LED (b) buzzer (c) LDR (d) resistor
  10. 10.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  11. 11.What does an LED do? (a) is a resistance knob (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  12. 12.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  13. 13.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) diode (d) buzzer
  14. 14.What does a thermistor do? (a) senses how bright it is (b) lets current go one way (c) senses how hot it is (d) boosts a small signal
  15. 15.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) blows if current is high (d) turns a fan or wheels
  16. 16.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) capacitor (d) buzzer
  17. 17.True or false: an LED glows using little power. (a) False (b) True
  18. 18.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) transistor (d) capacitor
  19. 19.What does a diode do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
  20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) potentiometer (d) capacitor
  21. 21.What does a capacitor do? (a) stores a little charge (b) limits the current (c) senses how hot it is (d) is a resistance knob
  22. 22.🧩 Which component glows using little power? (a) LED (b) buzzer (c) LDR (d) fuse
  23. 23.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) buzzer (d) LDR
  24. 24.What does a resistor do? (a) glows using little power (b) senses how hot it is (c) blows if current is high (d) has coloured bands
  25. 25.🧩 Which component makes things spin? (a) thermistor (b) capacitor (c) motor (d) resistor
  26. 26.🧩 Which component makes a beeping sound? (a) capacitor (b) LED (c) buzzer (d) resistor
  27. 27.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge
  28. 28.What does a capacitor do? (a) beeps for an alarm (b) limits the current (c) senses how bright it is (d) smooths a wobbly supply
  29. 29.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) is a resistance knob (d) glows using little power
  30. 30.True or false: a buzzer is a resistance knob. (a) True (b) False
  31. 31.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) fuse (d) diode
  32. 32.True or false: an LED limits the current. (a) False (b) True
  33. 33.True or false: a potentiometer limits the current. (a) False (b) True
  34. 34.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) blows if current is high
  35. 35.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) potentiometer (d) buzzer
  36. 36.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) buzzer (d) LED
  37. 37.True or false: a motor beeps for an alarm. (a) True (b) False
  38. 38.True or false: a motor turns a fan or wheels. (a) False (b) True
  39. 39.True or false: a transistor makes a beeping sound. (a) False (b) True
  40. 40.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) limits the current (d) beeps for an alarm

Answer key

  1. True
  2. a motor
  3. a buzzer
  4. fuse
  5. True
  6. capacitor
  7. resistor
  8. True
  9. resistor
  10. False
  11. glows using little power
  12. store charge briefly
  13. transistor
  14. senses how hot it is
  15. senses how bright it is
  16. diode
  17. True
  18. potentiometer
  19. lets current go one way
  20. motor
  21. stores a little charge
  22. LED
  23. capacitor
  24. has coloured bands
  25. motor
  26. buzzer
  27. makes a beeping sound
  28. smooths a wobbly supply
  29. blows if current is high
  30. False
  31. thermistor
  32. False
  33. False
  34. boosts a small signal
  35. LDR
  36. buzzer
  37. False
  38. True
  39. False
  40. limits the current

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